Roman Catechism 40.1

Chapter 40 — Part IV: Prayer — The Sixth Petition: Lead Us Not into Temptation

Section 1. Importance Of Instruction On This Petition — When the children of God, having obtained the pardon of their sins, are inflamed with the desire of giving to God worship and veneration; when they long for the kingdom of heaven; when they engage in the performance of all the duties of piety towards the Deity, relying entirely on His paternal will and providence, -- then it is that the enemy of mankind employs the more actively all his artifices, and prepares all his resources to attack them so violently as to justify the fear that, wavering and altered in their sentiments, they may relapse into sin, and thus become far worse than they had been before. To such as these may justly be applied the saying of the Prince of the Apostles: It had been better for them not to have known the way of justice, than, after they have known it, to turn back from that holy commandment which was delivered to them.